Valve.



O. G. HITCHCOCK.

VALVE.

AYPLICATIOH I'ILEB APB. 23, 1908.

muted sept. 15,1908.

Unirnnsrnrns rLxTENT oir-FICE.

OTTO G. HITCHCOC PQQF ein, Pssnsrrrnuix, .Assiokon 'ro nus MANUFACTURING oon- PANY, OF hk1lrENr:srmANrA,A CORPORATION or PENNSYLVANIA.

VALVE.

Specification o! Letters Patent.

' Patented Sept. 151908.

lpiicason nea April 23, 190s. seran No. 428.854

`To all 'whomz'tmay concern;

Dc 1t known that l, OrrrG, HH-CHUOCK, a citizen of the United Statesresiding 3.1; Erie, in the county of Erie. and Lam of Penns- Vania, have invented newmld useful Im. provenients in Valves. of wlgh the follgwing 1s a. specification. .ff

This invention relates to'alves md com sists in certain nnprovemets in the construction thereof as will be greinafter fully described and pointed out inhel Claims,

More particularly the invrtion relates to a valve which is adapted to elet. Closure. at. one side of the Valve, and #lf .ste from the opposite side of the valve g perform the functions that are ordinsrillggrfgrmed by waste cocks.

The invention is illustratedn the accom# panying drawings as follows'. nre 1 Shows a. central vertical section of thvalve. Fig. 2 a vertical section of the val; disk7 and a portion of the stem. Y

marks the valve body on hier. there is the diaphragm 2. The valve ning 3 extends through this diaphragm, ad the Valve is opened by movement toward id from this diaphragm. The Valve disk iperates on the seat surrounding the openg 3. It is secured to a stein 5 by means ra screw 5, The stem has the screw thread )reierably immediately above the. disk 4. his operates on the screw thread 8 arrangl in the extension valve chamber 7.

A closure. is effected by aserieof leather disks 9 resting on a metal dis 11. The metal disk rests on the shouldel() in the chamber '7. The leather disks e held in place and put under compressii by the waste cap 12. This is provided nh the an nular shoulder 13 which is enga-gi by the flange nut 14, the ilange nut being rewed to the exterior of the chamber 7.' A issage or chamber 15 is formed in the was cap 12, and communicates with the was or diri'l nozzle 16. The upper end of tl cap is closed by a gland 17 in which pced the mcking 1S put under conipressioLby follower 19.

The stem has the opening 20 whictxtends 50 upwardly from the bottom of the sto a sufiioient distance to reach through the closure formed by the washers 9 when the valve disk is on its seat. This iessage is screw threaded at the bottoni an( is preferably closed irnmediately above the screw thread by the plug 21. A cross passage 22 is arranged through the. stem at a )oint just below the metal Washer 11 when tlhe valve disk 4 is on. its seat. A second cross passage is arranged through the stem immediately above the olosure formed by the washers 9. The openings 22 and 23 lead from or enter the opening 20, so that a means of communication is estat lished from below the closure in the valve chamber to above. it when the valve is closed. An opening 24 extends through the. screw threaded part of the stem, so that the valve chamber 7 is in communication with the waste or discharge side of the body at all times.

"hen the valve is closed the discharge side of the body can drain through the passage 24, chamber 7, cross passage 2'2, opening 2U, cross passage 23, chamber 15 and nozzle 16. As soon as the valve disk is opened the cross passage 22 is brought. into the closure thus preventing a back leakage from the discharge end of the body when the valve is opened.

'With this invention ihe. waste passage. is closed almost immediately with the initial openingof the volvo, so that little dill-euliy is experienced by leakage by reason of back pressure. It also forms a construction which can be cheaply' manufactured. It will he noted that the waste cap l2 can be turned in any direction, tho friction on the leather washer being suilicient to hold it in place, but not so great to prevent its ready turning. i

W'hat I claim as new is:

In a valve, the combination of' a valve body having a screw threaded extension chamber 7 thereon, said chamber being provided with a packing chamber terminating in the shoulder 10; a metal disk resting on the shoulder 1U, packing means resting on the metal disk and located within the chamber; a valve disk operating upon the valve seat; a stem secured to the disk, and havin a screw thread thereon for operating in tie screw thread extension, said stem having a passage forming a means of communication through the packing when the valve isclosed, Suid passage being closed by the packing when the valve is open; a follower entering the ohnm- 5 ber and resting upon lche packing and cong I taining a drain passage; and a nutl for exerting pressure upon the follower.

O'ITG G. HITCHCOCK. Witnesses:

K. R. KAN?, V. C. Huss.v 

